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Published on September 7, 2011

Light-Induced Gold Iridescence (Sunburn) of EPDM Weatherseals

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Date Published September 7, 2011

Automotive weatherseals are made from ethylene-propylene-diene terpolymer (EPDM). When exposed to sunlight, a subtle discoloration of the surface develops. Although the color does not affect the part’s properties or function, a remedy has long been sought. This talk presents experimental work to identify the source of the color and provides a new hypothesis to attack the problem.